Tates faten



(No Model.)

J. DBMAREST.

WATER GLSET GISTBRN.

Patented Peb. 2l, 1888.

N. PETERS. Phnmhmngmpner, wnlmgmn. (1::4

'filaire drains llerena* @einenQ JOHN DEMAREST, OF NEV YORK, N. Y., ASSIGNOR TO THE J. L. MOTT IRON VORKS, OF SAME PLACE.

WATERnC-LOST CISTERN.

SPECIFICATION forming part of Letters Patent No. 378,294-, dated February 21, l.

Application tiled October 1T, 18S?. Serial No. 252,36.

To @ZZ whom, t :2z/ay concern:

Be it known that I, JOHN DEMAREST, of the city and State of New York, have invented an Improvement in lVater Closet Gisterns, of which the following isa specication.

Water closets have been made in which there is a siphon in the discharge or sewer pipe,and this siphon is exhausted by the action of the water rushing out of the cistern.

My present improvement relates to the cis tern made use of with this character of closet.

In the drawings, Figure l is a vertical section of my improved cistern. Fig. 2 is a sectional plan at the line :c ai, and Fig.` 3 is a section ofthe valve in a inodilied form.

The cistern A is to be of any desired size, and the water lis supplied by a pipe, B, and ballvalve, C, as usual, and there is a minus pressure-chamber, F, formed by the cross-partition V within the eistern and the removable cover E to the same, which cover is packed air-tight at its edges. The pipe G leads from the siphon of the closet to the minus pressnre-cha1nber F, and it opens near the top of such chamber F, and the pipe H, leading` from the lushingrinl or" the closet, opens through the bottom of the eistern into the minus pressure chamber F, and there is a valve seat around the upper end of this pipe H and a valve, I, that lits the saine, and this valveI is upon the underside of the iioat K,and through this float l is the tubular valvestem L, that is guided at the lower end by the parallel legs or guides N, that pass down within the pipe H. At the upper end of the tubular valvesteni L are openings 3, so that the water can overliow through the tube L, should it rise too high in the cistern A. The stem is fastened to the upper end of the tube L and passes freely through a hole in the top E of the nuinus pressure-chamber F, and there is a lever, S, pivoted upon the top E and acted upon by the closet-pull, and the stern 4 passes freely through an eye in this lever S, and there is a head to the stem 4, so that when the lever S is acted upon the stern 4, tube L, float K, and valve I are lifted and the water rushesrapidly through the pipe H to the riin of the closet, and the descent of the water in the minus pressurechainber andthe suction action of the descending water at the lower end of the tube (No model.)

L cause a ininus pressure in the chamber F sufficient to withdraw the air from the Siphon ofthe closet by the tube G.

In cisterns of this general character which I have heretofore constructed the hole in the cover E for the stem 4 has litt-ed said stein, to prevent-the suction action in the minus chan1- ber being interfered with by air passing in at this point. In my present improvement I make this hole considerably larger than the stem 4, to allow air to pass freely through the saine, and I place a valve, 6, at the upperend of the tube L and around the stem 4, said valve being preferably a shortplug fitting into the hole, with a conical top end to guide the same into the hole as the loat carries the upper end of the stein L up against the under surface of the cover E, as seen in Fig. 3; but a disl; of rubber upon the upper end of this stem L may forni the valve, as seen in Fig. l. Hence in the normal position, with the valve I upon its seat, air can freely pass through the hole in the cover E, and the water is free to rise in the niinus pressure-chamber F and 7- stand at the same level as it does in the cistern A; but as soon as the valve and iloat are lifted the valve 6 closes suoli opening in the cover airtight,or nearly so. Hence the minus pressure-chamber F is rendered air-tight at this point during the descent of the water in such chamber, and such water more fully exhausts the air from such chamber, insuring a perfect action of the Siphon ofthe closet, and the valve 6 is kept closed by the action of the float K until the vWater has descended sufliciently to allow the iioat K to descend, and at this nioment the valve 6 is drawn away from the opening in the cover E,and air is admitted into the minus pressure-chamber F and to the siphon of the closet, so that such siphon ceases to act; but the water continues to run out of the minus pressure-chamber F until the valve closes upon its seat, and in so doing sufiioient water passes into the closet to properly lill and seal the trap 95 thereof.

It is preferable to make use of asniall opening, 7, through the partition for the passage of the water, so that the Water will not pass out of the cistern A as fast as it does from the miroo nus chamber F, and only the contents of such chamber F will pass to the closet, together with so much of the water in the eistern A as runs through this small opening 7 previous to the valve closing upon its seat.

I do not herein lay claim to a minus pressure-chamber, a finishing-pipe, a valve to close the sanne, and e ilont to sustain the valve 11ntil air is admitted into the minus pressurechamber, as the same are set forth in my pending applications, Nos. 202,352 and 215,781, filed May 17, 1886, and October 9, 1886, respectively.

I claim as my invention- 1. The combination, in a water-oloset eistern, of a minus pressure-ehzunber closed at the top and having a pipe, G, leading to the Siphon of the eloset,the flushing-pipe H,valve I, float K, tubular' stein L, and the stem 4, passing th rough the top of the minus pressure chamber, and a. valve, 6, at the top of thetube L, substantially as set forth.

2. The combination, in a Water-closet cisl 

